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MitreCVE-2019-12830

HistoryJun 15, 2019 - 6:29 p.m.

CVE-2019-12830

2019-06-1518:29:00

CWE-79

mitre

web.nvd.nist.gov

134

mybb

1.8.21

parsing flaw

xss

nested video mycode

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS3

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

AI Score

8.2

Confidence

High

EPSS

0.001

Percentile

28.9%

JSON

In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.

Affected configurations

Nvd

Node

mybbmybbRange<1.8.21

VendorProductVersionCPE
mybbmybb*cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mybb	mybb	*	cpe:2.3:a:mybb:mybb::::::::

References

blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-release/

blog.ripstech.com/2019/mybb-stored-xss-to-rce/

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS3

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

AI Score

8.2

Confidence

High

EPSS

0.001

Percentile

28.9%

JSON

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